Making more biogas

136. As with your old biogas unit, the easiest way to make more
gas is to build one or more small units and get gas from them all.

137. If you can get more oil drums, pipe, T- pieces, valves, inner
tubes and gas lines, and if you have enough time, you can build and run more
units.

138. The drawings below show you how to connect several unitsto
the same gas line with T- Pieces.

T- piece

139. As you have already been told in Booklet No. 31, when you
have several biogas units, fill them with waste at different times. That way,
when all the gas in one unit has been used, you will get gas from another unit
that is still
working.